Manley Extreme Duty Series performance steel valves are a great choice for supercharged, alcohol-burning, or high-revving engines. These engines generate a lot of heat and require special valves that can handle that kind of punishment. All valves are made from the best stainless steel available, with chrome stems and hardened valve tips. Extreme Duty Series valves are swirl-polished and fully machined and available with either undercut heads or straight stems.

More From This Category

MANLEY Valve, Race Master, Exhaust, 1.71 in. Head Dia, 0.3415 in. Stem Dia, Stock in. Length, For Ford 351C, Set of 8

MANLEY Valve, Race Master, Exhaust, 1.71 in. Head Dia, 0.3415 in. Stem Dia, Stock in. Length, For Ford 351C, Set of 8

$380.66

MANLEY Valve, Race Flo, Intake, 1.85 in. Head Dia, 0.342 in. Stem Dia, 5.075 in. Length, For Ford SB, Set of 8

MANLEY Valve, Race Flo, Intake, 1.85 in. Head Dia, 0.342 in. Stem Dia, 5.075 in. Length, For Ford SB, Set of 8

$380.66

AFR Intake Valve, SBF 8MM Stainless Steel 1.900 X 5.080 O.A.L. Pedestal Race, Set

AFR Intake Valve, SBF 8MM Stainless Steel 1.900 X 5.080 O.A.L. Pedestal Race, Set

$322.77

AFR Exhaust Valve, BBF 11/32” Inconel 1.760 X 5.050 O.A.L. Race, Set

AFR Exhaust Valve, BBF 11/32” Inconel 1.760 X 5.050 O.A.L. Race, Set

$898.75

AFR Exhaust Valve, BBF 11/32” Stainless Steel 1.760 X 5.050 O.A.L. Race, Ea.

AFR Exhaust Valve, BBF 11/32” Stainless Steel 1.760 X 5.050 O.A.L. Race, Ea.

$55.65

AFR Intake Valve, SBF 8MM Stainless Steel 1.900 X 5.080 O.A.L. Pedestal Race, Ea.

AFR Intake Valve, SBF 8MM Stainless Steel 1.900 X 5.080 O.A.L. Pedestal Race, Ea.

$38.96